/Engine/Plugins/Developer/Concert/ConcertSync/ConcertSyncCore/Source/ConcertSyncCore/Public/ConcertLocalFileSharingService.h
Copies the content of the archive in the service storage and return a unique ID required to consume it back. The stored file expires in 1 hour.
virtual bool Publish ( [FArchive](API\Runtime\Core\Serialization\FArchive) & SrcAr, int64 Size, [FString](API\Runtime\Core\Containers\FString) & OutFileId )